What if the event is the birth of Jean Grey? Sort of repetitive in that John Connor mode, but think about it. A mutant more powerful than Xavier and Magneto? Albeit how would anybody know that of an infant? The event ensuing from the end of TLS is the creation of the Sentinels. Maybe if she is killed off at birth, the war against mutants would never escalate to the point where Sentinels are required. But given the premise of Nixon and the Washington D.C backdrop movie has going for it, it will probably be politically motivated.

So the fate of the mutant world is gonna rely on the Sentinel bill being passed or rejected in Congress? Just seems kind of lack luster. I am thinking Magneto will try to assassinate a political target that tries to pass an anti-mutant bill (but not Sentinels per say), and when his is killed, a more aggressive bill is proposed (this bill being the one that actually implements motha ****in' Sentinels)

What some are forgetting If the sentinles come into being post trilogy before
time travel happen.So something In 1973 before the time travel sets In motion
the events that will ultimetly leads to sentinles post trilogy+The Wolverine.

My thinking It could be during time Nixon and all that was going on at ime In X-Men version of 1973 secret weapons That can be used against mutants.
If Peter Dinklage Is playing Boliver Trask he could be key figure In devolping these weapons and one that he devolps Is early plans for sentinles.Mystique
could be undercover and discover these weapons being devolped.Perhapes
before the time travel Magneto launches attack on washington that kills
Trask,escaletes the weapon X project,and helps set up 1:The push for registration act and 2:Stryker's homicadle plans

If they want to tie In the cure perhapes after learning the cure was only tempory a radical group got ahold of Trask's plans that was unable to be built with 1970's technolgy and then build them with more present technology.

What if the event is the birth of Jean Grey? Sort of repetitive in that John Connor mode, but think about it. A mutant more powerful than Xavier and Magneto? Albeit how would anybody know that of an infant? The event ensuing from the end of TLS is the creation of the Sentinels. Maybe if she is killed off at birth, the war against mutants would never escalate to the point where Sentinels are required. But given the premise of Nixon and the Washington D.C backdrop movie has going for it, it will probably be politically motivated.

That is actually pretty interesting. What if it isn't the X-Men who are trying to alter time/space? In the comics, Bishop wanted to kill Hope (when she was a baby) because he thought she was what created his awful timeline. What if Bishop is the one that goes back with a nefarious plan and it's up to the future X-Men to follow him somehow and stop him?

It's also repetitive and cliched. But I think the young Jean needs to be featured at some point in the sequel most likely. The scene in TLS needs to be expounded upon, because it's a good plot device to set things in motion. Maybe manifest the White Phoenix and see her live to the full Phoenix potential in an X4 or beyond. Let's face it, we want to see Apocalypse, but more so, we want to see the Phoenix done properly in all its glory, even if it means abolishing the OT with the alternate timeline.

Yes I think the idea is suppost to be young xavier is in a dark place, depressed and uncaring about his appearance from how he looked in the picture singer released so maybe there isn't any X-men in the 70s, maybe hasn't even started the school yet

In Fist class he lost the use of his legs, lost raven, pretty much failed to stop Eric

Yes. I think it seems more likely that Beast is using an image inducer, as Singer said there will be new technology featured in Days of Future Past we haven't seen before. An image inducer also makes sense given Hank's distaste for his beastly appearance in First Class and his propensity to invent things. It's also possible, as others have pointed out, that this could be one of many realities, as Singer has discussed the possibility of multiverses. Who knows?

Yes I think the idea is suppost to be young xavier is in a dark place, depressed and uncaring about his appearance from how he looked in the picture singer released so maybe there isn't any X-men in the 70s, maybe hasn't even started the school yet

In Fist class he lost the use of his legs, lost raven, pretty much failed to stop Eric

I think all this will have an impact

its been ten years would he really think he's still moping about that... he seemed pretty well adjusted at the end of first class